Examples of java.security.Signature.verify()

java.security.Signature.verify()
Verifies the passed-in signature.
A call to this method resets this signature object to the state it was in when previously initialized for verification via a call to initVerify(PublicKey). That is, the object is reset and available to verify another signature from the identity whose public key was specified in the call to initVerify. @param signature the signature bytes to be verified. @return true if the signature was verified, false if not. @exception SignatureException if this signature object is not initialized properly, the passed-in signature is improperly encoded or of the wrong type, if this signature algorithm is unable to process the input data provided, etc.

        catch (Exception e)
        {
            throw new SecurityException("exception encoding TBS cert request - " + e);
        }


        return sig.verify(sigBits.getBytes());
    }


    /**
     * return a DER encoded byte array representing this object
     */

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        signature.initVerify(key);


        signature.update(this.getTBSCertificate());


        if (!signature.verify(this.getSignature()))
        {
            throw new InvalidKeyException("Public key presented not for certificate signature");
        }
    }

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        signature.initVerify(key);


        signature.update(this.getTBSCertificate());


        if (!signature.verify(this.getSignature()))
        {
            throw new InvalidKeyException("Public key presented not for certificate signature");
        }
    }
}

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            Signature s = Signature.getInstance("SHA1withRSA");
            s.initVerify(pubKey);
            s.update(data);


            return s.verify(signature);
        } catch (NoSuchAlgorithmException nsae) {
            throw new InvalidSignatureException();
        } catch (IOException ioe) {
            throw new InvalidSignatureException();
        } catch (java.security.InvalidKeyException ike) {

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             */
            Signature sig = Signature.getInstance("SHA1withDSA");
            sig.initVerify(pubkey);
            sig.update(data);


            return sig.verify(encoded);
        } catch (NoSuchAlgorithmException nsae) {
            throw new InvalidSignatureException();
        } catch (java.security.InvalidKeyException ike) {
            throw new InvalidSignatureException();
        } catch (IOException ioe) {

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      }
      updateSignatureWithHeader(headers, verifier);
      ParameterParser parser = new ParameterParser();
      String strippedHeader = parser.setAttribute(headerValue.toCharArray(), 0, headerValue.length(), ';', "b", "");
      verifier.update(strippedHeader.getBytes());
      if (verifier.verify(getSignature()) == false)
      {
         throw new SignatureException("Failed to verify signature.");
      }
   }
}

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                sig.update(buffer, 0, len);
            }
            bufin.close();


            /* verify */
            boolean verifies = sig.verify(sigToVerify);
            //System.out.println("Signature verifies: " + verifies);


            return verifies;


        } catch (NoClassDefFoundError e) {

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        length = buf.read(temp);
        sig.update(temp, 0, length);
      }
      buf.close();


      boolean isVaild = sig.verify(hexStringToByteArray(signature));
      System.out.println("Validated " + filename + ": " + isVaild);
      return isVaild;
    } catch (Exception e) {
      e.printStackTrace();
      return false;

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                               PKCSObjectIdentifiers.md2WithRSAEncryption.equals(alg0) ? "MD2withRSA" :
                               PKCSObjectIdentifiers.sha1WithRSAEncryption.equals(alg0) ? "SHA1withRSA" : null;
        Signature signObj = Signature.getInstance(signAlgString);
        signObj.initVerify(pubKey);
        signObj.update(pkacSeq.getEncoded());
        boolean verified = signObj.verify(signature);
        if(!verified) throw new Exception("SignedPublicKeyAndChallenge verification failed.");
        map.put(CERT_REQ_PUBLICKEY, pkInfo);
        map.put(CERT_REQ_PUBLICKEY_OBJ, pubKey);
        if(((DERString)ch).getString() != null) map.put(PKAC_CHALLENGE, ((DERString)ch).getString());
        return map;

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        catch (Exception e)
        {
            throw new SecurityException("exception encoding TBS cert request - " + e);
        }


        return sig.verify(sigBits.getBytes());
    }


    /**
     * return a DER encoded byte array representing this object
     */

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